Riding Equipment Mountain Riding Unisex Helmet Bike Helmet MTB Road Bike Bicycle Cycling Helmet Safety Head Protector Ultralight and Integrally Molded 21 Air Vents Size Medium Designed to keep you cool even in hot weather, the Intercept offers 21 flow vents to ensure airflow and is outfitted with pads that help control the build-up of perspiration inside the helmet Adult bicycle helmet with dual fit adjustable design+Very low weight, about 260g, Size: M (55-58cm) 21.6inch-22.8inch High density EPS foam make your feel more comfatable, generate cushioning effect when impact, give your head protection Snap-on visor for protection from the branch, avaliable for Mountain & Road Anatomic design, senior double-sided velvet protection pad+Easy to use,with buckle connection